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Test whether the following matrices are nonsingular: 1 (0) [ 7 -1 1 [ (a) 19 1-3 7 1 0 1 40 4-2 1

Test whether the following matrices are nonsingular: 1 (0) [ 7 -1 1 [ (a) 19 1-3 7 1 0 1 40 4-2 1 (b) -5 60 7 03 (c) (d) 13-3 -495 301 1086 0 4

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